Air-valve.



R. A. GALLY.

AIR VALVE.

APPLICATION FILED FEB.6, 1913.

Patented July 14, 1914 W w NN 7. MN M SN w$NNN MN N 7 N Q W N mN m %N 33 O 1, 4 1 L w 0 wAsnmaraN, D. c.

UNITED sTA EsPATI NT OFFICE. v

ROBERT A. GALLY, or CINCINNATI, OHIO, ASSIGNOR To THE BALDWIN COMPANY,

or CINCINNATI, OHIO.

AIR-VALVE.

Specification of Letters Patent.

Patented July 14, 1914.

Application filed February 8, 1913. Serial No. 747,131.

, ful Improvements in Air-Valves, of which the following isaspecification.

Previous devices of this character have lacked permanent flatness,security of assemblage, and ease of regulation, where the presentinvention has sure joining of guard, leather and felts, with certaintyand facility of regulation of spring, and a lasting true face, all beingespecially useful for sensitive and quick working valves, as for bellowsof player pianos, vacuum cleaners, etc.

In the drawings, Figure 1 is a plan view of a complete bellows valve andspring; Fig. 2 a side view with rim ofguard partly removed; Fig. 8 is aplan view of valve with spring and center screwremoved; and'Fig. 4 is aside view of the complete device in section.

A disk valve 1 of flexible material as leather requires a guard 2 ofstiff material as tin to hold the flexible disk 1 to its seat 8,especially when the valve is hung under the seat, where its weight wouldtend to make it sag. This guard should be of a true plane at its outerpart to make particularly certain the contact of the outer part of theflexible disk 1 to its seat 3. The guard therefore has its edge turnedup in a narrow flange or rim 4 around its circumference, holding itstiff from accidental bending, and enabling its exact truing by tappingon the top of the flange. The upturned rim 4 also enables the-grippingof the metal all around the edge of the guard against slipping while theinterior flat part is struck or stretched to remove any buckle of themetal.

The securing of metal to leather being difficult to do with certaintyand without causing unevenness in the leather when attached to the innerface of the guard 2, a washer 5 is placed on the outer face of the guard52 over a hole 6 in the guard, and the leather is then glued orotherwise attached to the washer 5 through the hole 6, thus holding bothto position with the guard 2. The washer 5 may be additionally attacheddirectly to guard 2. A hole 7 in the center of washer 5 and a hole 8through leather valve 1 center freely on the main guide 9, with the holein the leather 1 preferably larger than that in the washer 5, as leatheris apt to corrode the guide if latter is of metal, while washer 5 may beof a safe material like felt or bush-cloth. As screws having threadssuitable for wood,

and ofv proper size for this structure, do not have a smooth part orbarrel long enough for the purpose of this valve guide 8, it hasheretofore been necessary to take an extra length screw and cut off itspoint end, making a poor end to enter wood, so to avoid this and at thesame time secure a better material for the valve to move on, a tube orsleeve 10 is slid over a screw of proper length not to extend throughthe seat 3, this sleeve covering all threads of the screw which areoutside the seat, and allowing a smooth sliding guide surface of fiber,brass, or other desirable material.v As this sleeve 10 can be made of acorrect length to act as a stop or check under the head 11 of guide orscrew 9, the exact distance of that head 11 from the seat 3 is alwaysassured when the guide 8 is replaced after removal. A spring 12 iscentered on the guide 9 and sleeve 10, extending from the outer face ofthe valve parts out toward the head 11 of guide 9, which resists thepressure of the spring. One or more washers or burrs 13 are placedbetween the head 11 of guide 9 and the outer part of the spring 11, sothat by removing or adding to the number of said washers a fineregulation of the tension of spring12 may be had without the trouble ofaltering the spring.

To prevent squeaking or rattling of the spring 12 where it runs onsleeve 10 or guide 9, or where its own coils might touch each other, aspecial soft bushing 14 is employed. This bushing 14 is placed insidethe small center coil of spring 12 which is next to the valve andtravels on the sleeve 10 or guide 9, thus damping any sound from thatmotion, and the felt or cloth of this bushing 14 is brought out betweenand beyond the large coils of the spring 12, preventing any noise ofcontact of such coils together or of the inner coil against the guard 2.

To prevent the valve from revolving on its center and thereby changingthe position of its leather 1 in holding over the ports 15, andconsequently losing tightness by the shifting of the impressions of theports 15 on the leather 1, a guide pin 16 is driven into the seat 3 nearthe outer edge of leather 11 1 and guard 2 and centered with a hole 17.

in: guard .2. To preVentnOise, a. soft or dead"-' Washer 18"is' attachedover, the, hole 17 With a guide hole 19 in Washer l8"freely fitting thepin 16, and a larger hole 20 'is'' provided in leather 1 so that theleather, needs no attachment to. the guard atthat.

part, and yet Willnever catch on the pin.

A polygonal or other" form of valve or" 10 guard may be used instead ofthe disk shape,

although that is preferred;

Various other 'Inod-ifi'oationsor substitu ti'ons may be made and yetthe structure-be'- subjected to,'-

a hole therein smaller than the hole' in the guard and attached totheouterface-of "said guard Withits hole over the hole-in-the guard,andi opposi-teto the hole in thevalve;

ZB'I-said valve and 'saidvvasher loeingattached together through the 1hole-iuthe guard:

2; A valve device- 'oomprising: a flexible valve having-a hole thereni,and astiff g guard on: the outer fac'e of s'aid va'li'z'e, and

having a hole therein opposite to and larger iaxholei. therein smallerthan the hole in the guard and attached to the outer face of said qguardWith its hole over the hole in the .;guard,.and. opposite to the hole inthe valve.

valve means provided, with a guide hole, a guidescrevv'entred into saidseat and extended through the guide hole, aspring having severalcoils'surrounding' said guide, a loop *on said spring sli dab ly=engaged on 1 guide or screw" eiitered into said "se'atand having severalcoils surrounding said guide;

said guideg and a sofflbhshing -1n said loop thereto:

ROBTE A. GALLY;

Witnesses S Ma WAMAOKSf' J; MAGY.

(2619190 053111! pgtent sma meobtam'ed listava cents each; byaddrbs'sfiigiy o'iimmi'silbne'r of:- 1mm;

Washington; or 0"- than saidhole in thevalve, a washer having' StA-valve-seat and a valve-means,- said said guide, and a soft hushing'irr said loop' "and" extended" outwardly between -the= said 4? Avalve-seat: and a valve ureansg v said valve means provlded with"a-"'glf11de" hole, a

j extended through are guide-"hole; a spring .a a; loop on said spring"'sli dably engaged on i extended outwardly between' the valvemeans-andthe p'a'rt of th'e' spring adj acen't 5 g

